This filters out dust and sand in the air, ensuring that clean air enters the cylinder. For Smart Forfour, Hatchback, and Convertible models, part number 2810940000 The special material provides high airtightness and achieves high filtration performance. It filters out dust and sand in the air, ensuring that enough clean air enters the cylinder. Particles in the air can be removed before they enter the engine. Thank you for viewing! ⭐️ Instant purchase is OK! ♪♪♪ If you have any questions, please ask before purchasing. ☺️ Also, please read the profile for more information. ✨ We have many other products! ♡ We offer discounts for multiple purchases! ♡ #saya's products ☜☜ 22-13 4614